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Wieslaw Kosiorowski

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POL · 48 yrs · K=40 · Peak 1747 (By Jan 2025)

Best performance: 1897 at DMP - V Liga PK Seniorow 2024 Round 1-5(Best of 2024)

World #=188173 live, down 2494#185,679 publishedPoland #=5253

Classical rating

1511

FIDE’s November 2026 list. No rated games since, so the live rating is the same.

On FIDE’s list since Jan 2025

How live ratings are calculated

Rating History · Classical

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Official classical rating by month
ListRatingChange
Nov 202615110
Oct 202615110
Sep 202615110
Aug 202615110
Jul 202615110
Jun 202615110
May 202615110
Apr 20261511+3
Mar 20261508-1
Feb 20261509-2
Jan 202615110
Dec 20251511+2

Form · Classical

oldest → latest

Longest unbeaten run in 2026: 6 games, Sep 19 – Oct 10.

From 44 classical games on record, the latest on Oct 11.

Classical games since the November list

No rated standard games this rating periodsince the NOV26 list (Nov 1, 2026)

Last playedScore
DMP V Podkarpacka Liga Seniorow 2026Sep 19 – Oct 11TPR 15214½/9

The live rating moves only when new rated games are played. Until then it matches the published rating.

Best wins · Classical

From 31 rated classical games against rated opponents, 2023–2026

#OpponentRating
1, Urszula Jakubowska, Oct 2024 · DMP - V Liga PK Seniorow 2024 Round 1-5, 1606
2, Olgierd Podstawski, Mar 2025 · DMP - IV Liga Szachowa Seniorow PK 2025 Round 1-5, 1560
3, Helena Taradajko, Nov 2024 · DMP - V Liga PK Seniorow 2024 Round 6-9, 1495

Event timeline · Classical

9 events

Events before the current rating period show the performance, not a rating change.

Live events show the rating change; earlier events show the performance rating.

Performance rating by year

YearGamesScoreAvg oppTPR
20265215931521
202515315811341
20248615481741
2023301313513

Games count in the month they were played. Each month and year is one performance rating over all of its rated games.

Rated near Wieslaw Kosiorowski · Classical

World

  1. #=188173Adam Ouleddahhou1511.0
  2. #=188173Franciszek Lewek1511.0
  3. #=188173Wieslaw Kosiorowski1511.0
  4. #=188173Piotr Kret1511.0
  5. #=188173Jaroslaw Kraus1511.0

Poland

  1. #=5253Kamil Kalinowski1511.0
  2. #=5253Franciszek Lewek1511.0
  3. #=5253Wieslaw Kosiorowski1511.0
  4. #=5253Piotr Kret1511.0
  5. #=5253Jaroslaw Kraus1511.0

Live rating: FIDE’s November list plus every rated game played since. Not affiliated with FIDE.